Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L61/00—Network arrangements, protocols or services for addressing or naming
  • H04L61/50—Address allocation
  • H04L61/5038—Address allocation for local use, e.g. in LAN or USB networks, or in a controller area network [CAN]
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M10/00—Secondary cells; Manufacture thereof
  • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
  • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M10/00—Secondary cells; Manufacture thereof
  • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
  • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
  • H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M10/00—Secondary cells; Manufacture thereof
  • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
  • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
  • H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L61/00—Network arrangements, protocols or services for addressing or naming
  • H04L61/50—Address allocation
  • H04L61/5092—Address allocation by self-assignment, e.g. picking addresses at random and testing if they are already in use
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
  • B60L2240/00—Control parameters of input or output; Target parameters
  • B60L2240/40—Drive Train control parameters
  • B60L2240/54—Drive Train control parameters related to batteries
  • B60L2240/545—Temperature
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
  • B60L2240/00—Control parameters of input or output; Target parameters
  • B60L2240/40—Drive Train control parameters
  • B60L2240/54—Drive Train control parameters related to batteries
  • B60L2240/547—Voltage
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L12/00—Data switching networks
  • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
  • H04L12/40—Bus networks
  • H04L2012/40267—Bus for use in transportation systems
  • H04L2012/40273—Bus for use in transportation systems the transportation system being a vehicle
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
  • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
  • Y02E60/10—Energy storage using batteries
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
  • Y02T10/00—Road transport of goods or passengers
  • Y02T10/60—Other road transportation technologies with climate change mitigation effect
  • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
  • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
  • Y02T90/10—Technologies relating to charging of electric vehicles
  • Y02T90/16—Information or communication technologies improving the operation of electric vehicles

Definitions

• the present invention relates to a power management device for an electric vehicle including a power supply unit in which a plurality of modules are arranged.
• An electric vehicle has a motor as a drive source and a battery as a power source.
• the performance and capacity of the battery will affect the distance traveled, so usually multiple rechargeable batteries are installed.
• the battery for an electric vehicle is deteriorated in the life performance by repeating charging and discharging, and the temperature environment is also a factor of deterioration.
• Japanese Patent Laid-Open No. 7-3 1 1 2 4 8 a measuring line is connected to the terminal of each battery during maintenance, etc., and a battery deteriorated from a change in voltage obtained by the connecting line is specified. . Disclosure of the invention
• Patent Document 1 an operator attaches a measurement line for voltage detection to a battery terminal with a clip or the like at the time of work and connects it to a detection circuit, and identifies a deteriorated battery from the detected voltage. , The detection action by the worker one by one It must be complicated.
• a power management device for an electric vehicle having a power supply unit in which a plurality of modules each including a plurality of battery cells according to claim 1 is arranged is mounted on each module, and Module state detection means for detecting voltage and temperature, and control means for determining the state of each module based on the information detected by each module state detection means.
• Module state detection means for detecting voltage and temperature
• control means for determining the state of each module based on the information detected by each module state detection means.
• Connected in series via a communication line assigns an identification number to itself based on the ID information sent from the module status detection means upstream of the connection, and detects the module status downstream of the ID information including that identification number
• the control means is connected to each module state detection means via a numbered communication line and a communication line, and is transmitted via the numbered communication line and the communication line. Based on the detection information, and the abnormality of each module characterized by identifying for each module.
• each module state detection means and the control means are connected in a ring shape via a numbered communication line.
• the module status detection means in determining the status of each module based on the information detected by the module status detection means mounted on each module, the module status detection means is connected in series via the numbered communication line.
• the ID number is assigned to itself based on the ID information sent from the module status detection means upstream of the connection. This function functions to send the ID information including the identification number of the module to the module state detection means downstream of the connection, so that the module can be identified accurately without worrying about the arrangement of the modules.
• the module state detection means since the module state detection means is assigned an identification number after being placed in each module, it can be the same at the time of placement of each module state detection means, so it is possible to reduce the types of parts and to manage costs. Can be reduced and assembly errors cannot occur.
• control means is connected to each module state detection means via a numbered communication line and a communication line, and the module detects an abnormality of each module based on the detection information transmitted via the numbered communication line and the communication line.
• the function to transmit ID information and the function to detect abnormalities in each module can be integrated into the control means, and the function of each module state detection means can be simplified. .
• FIG. 1 is a schematic configuration diagram of an electric vehicle according to an embodiment of the present invention.
• FIG. 2 is a block diagram showing the configuration of the power supply unit and the control system according to the present invention.
• FIG. 3 is a diagram showing a communication protocol of data transmitted by each module state detecting means.
• Figures 4 (a) and 4 (b) are diagrams showing the structure of data transmitted by each module state detection means.
• FIG. 5 is a diagram showing the contents of the ID information included in the transmission data.
• FIG. 6 is a diagram showing a table for automatically assigning ID information included in each module state detection means.
• Fig. 7 shows the contents of the automatic numbering control executed by each module state detection means. It is a chart.
• FIG. 8 is a block diagram showing another form of automatic assignment to modules ( description of reference numerals)
• a power management device that can accurately and easily manage the power supply unit of an electric vehicle having a plurality of modules is connected to each module and control means via numbered communication lines and communication lines. Based on the detection information transmitted via the control module, it was realized by determining the abnormality of each module by the control means.
• an electric vehicle denoted by reference numeral 1 is driven by rotating a wheel 3 by driving a motor 2.
• a battery unit 5 serving as a power source for the motor 2 is disposed below the seat 4 provided in the passenger compartment 20 of the electric vehicle 1.
• Battery cut 5 A cell pack is composed of a plurality of cells as one module and a plurality of these modules.
• the battery unit 5 is housed in a unit housing portion 8 composed of a floor panel 6 constituting the vehicle body and a shielding plate 7 provided below the floor panel 6.
• the battery unit 5 includes 12 modules, that is, a module 5 A to a module 5 connected in series.
• the electric vehicle 1 includes an inverter 9 connected to the motor 2 and the battery unit 5, and cooling means 15 for cooling the battery unit 5.
• the cooling unit 15 includes a discharge fan 1 1 provided in the unit housing portion 8, a blower fan 1 4 disposed in the outside air introduction path 1 3 and a compressor 1 8, and has a cooling air flow indicated by a symbol S.
• the refrigerant is circulated through the refrigeration cycle between the blast airflow and the compressor 1 8 and the heat exchanger 1 7 arranged in the outside air introduction path 1 3 to cool the outside air and generate cooling air. It is supplied to the inside of the unit storage section 8 through the exhaust fan 11 and discharged to the outside by the discharge fan 11.
• the electric vehicle includes a power management device 30 as shown in FIG.
• the power management device 30 is mounted on each module, and detects the voltage and temperature of each module. Based on the information detected by the module status detection means 1 2 8 to 1 2 and each module status detection means. And control means 10 for determining the state of each module.
• the module state detection means 1 2 A to 1 2 L are constituted by known computers, and the same configuration is mounted on each module state detection means.
• Each module state detecting means is connected by a numbered communication line 21 in series in the unidirectional communication with the control means 10 first.
• the base end and the terminal end of the numbered communication line 21 are connected to the control means 10.
• Module state detection means 1 2 A to 1 2 L are connected to control means 10 via communication line 2 2. It is possible to communicate information such as temperature and voltage through the network.
• Each module state detection means 12A to 12 L assigns an identification number to itself based on the ID information transmitted from the module state detection means upstream of the connection, and the ID information including the identification number is connected downstream to the module. It has a function to transmit to the state detection means.
• the control means 10 is composed of a well-known computer, and receives and stores temperature and voltage information transmitted from each of the joule state detection means 12A to 12 L via the communication line 22, and is assigned number communication. A function of transmitting ID information to the downstream Joule state detection means 12 A via the line 21 is provided.
• the control means 10 is configured to store the temperature and voltage information transmitted from each of the joule state detection means 12A to 12L in association with the identification number transmitted via the numbered communication line 21. ing. In the control means 10, judgment values such as a reference voltage and a reference temperature are set in advance.
• Data transmitted from one module state detection means is communicated according to the communication protocol shown in FIG. 3 and is in the format of the numbered data frame shown in FIG. 4 (a).
• Communication protocol is unidirectional start-stop synchronization.
• start bit (ST) is 1 bit
• data bit number bit is 1 bit
• parity bit (single) is 1 bit even parity
• stop bit (SP) is lbit.
• the interface (I / F) is equivalent to ISO9141 at 2 kbps soil 1%.
• the numbered data frame is transmitted as a series of data including a header indicating whether the control means 10 is transmission data from the module state detecting means, numbered data, and a checksum.
• the numbered data frame data includes ID information # 1 to ID information # 4 as shown in FIG. 4 (b).
• Each ID information includes default, numbering complete, ID change, and numbering error information as shown in Fig. 5.
• the numbering order and the assigned automatic numbering are set differently, and this setting is determined by the ID information table shown in FIG.
• the ID information table is stored in each module state detection means, and each module state detection means is configured to store the module with automatic numbering based on this table.
• step A 1 of FIG. 7 when the ignition switch is turned on, one module state detecting means receives the numbered data frame. When received, it is determined in step A 2 whether a communication error or data frame abnormality has been detected. If there is no data frame error, the communication error goes to step A3. In step A 3, the current number ID is calculated from the numbered data frame based on the data table in FIG. 6, and the process proceeds to step A 4.
• step A4 the previous numbering ID is compared with the current numbering ID calculated in step A3, and the content of numbering ID is determined.
• step A5 the previous and current numbering IDs are the same without change, proceed to step A5 and send the ID information including the information indicating that the numbering ID was successfully assigned.
• step A6 communication is started via the control unit 10 and the signal line 14 and this control is finished.
• step A4 if there is no previous numbering ID and this is the first numbering for the module, go to step A7.
• step A7 the current numbering ID calculated in step A3 is determined as its own numbering ID, and the information on the numbering ID is written in its own ROM in step A8, and the process proceeds to step A9. .
• Step A9 it is determined whether or not the writing has been completed normally. Proceed to step A5 and send the ID information including the information indicating that the numbered ID has been successfully assigned. If the writing is not normal, the process proceeds to step A 10 to transmit the information indicating that the numbered ID is not normally assigned to its own ID information, and this control is finished.
• step A4 if the previous number ID is different from the previous number ID, proceed to step A11.
• step A 1 1 the current numbering ID calculated in step A3 is determined as its own numbering ID, and the information on that numbering ID is written in its own ROM in step A12. Proceed to step 3.
• step A 1 3 it is determined whether or not writing has been completed normally. If normal, the process proceeds to step A 1 4, indicating that the numbered ID has been successfully changed in its own ID information.
• step A6 communication is started via the control means 10 and the signal line 14 in step A6, and this control is completed. If the writing is not normal, the process proceeds to step A 1 0 to transmit the ID information including information indicating that the numbered ID is not normally assigned to the own ID information, and the control ends.
• the control unit 10 when the first numbered data frame is transmitted from the control unit 10, the information is received by the module state detection unit 12 A connected downstream, and the control of the above contents is performed by the module state detection unit. 1 2 A performs itself and sends its ID information to module status detection means 1 2 B. Such data flow and control are executed by each module state detection means, and finally returned to the control means 10.
• the control means 10 creates a data table corresponding to each module according to the assignment ID included in the numbered data frame transmitted from the module state detection means, and communication is started in step A6. Then, the temperature and voltage information sent is stored in the data table in association with each module according to the assigned ID.
• the voltage and temperature of each module written in the data table is used as the reference voltage.
• the situation is judged by comparing with the reference temperature. For example, if the detected voltage is lower than the predetermined voltage, or if the detected temperature is higher than the reference temperature, the module is identified as having an abnormality, and the details are notified to the driver.
• an alarm or warning lamp can be installed in the driver's seat, etc., and these alarms can be activated.
• the information detected by the module state detection means 12 A to 12 L mounted in the modules 5 A to 5 L constituting the battery unit 5 is used.
• module status detection means 1 2 A to 1 2 L are connected in series with the numbered communication line 21, and the ID information transmitted from the upstream module status detection means is used as a basis.
• the module itself is assigned an identification number, and the ID information including the identification number is transmitted to the module status detection means downstream of the connection. Therefore, the module itself does not care about the arrangement of each module. Since the ID is assigned to itself, the module can be identified accurately.
• control means 10 is connected to each module state detection means by the numbered communication line 21 and the communication line 22 and based on the detection information transmitted via the communication line 22, the abnormality of each module is As each module is identified, the abnormal module can be identified electrically, eliminating the need for complicated operations and managing the battery unit 5 easily.
• each module state detection means 1 2 A to 1 2 L assigns an ID for identifying itself as in the present invention, so that the module state detection means of the same configuration is provided.
• a stage can be mounted on each of the modules 5 A to 5 L, and parts can be shared to reduce costs.
• modules 5A to 5L are assigned identification information from numbered ID 1 to numbered ID 12 as the order of arrangement of modules 5A to 5L.
• modules 5A to 5L are not necessarily arranged in this order.
• the module 5A may be started from module 5G.
• a vehicle in which the motor 2 is mounted alone as an electric vehicle has been described as an example.
• the form of the electric vehicle is not limited to such a form, and the internal combustion engine and the motor 2 are connected.
• the contents of the present invention can be applied to a so-called hybrid electric vehicle mounted, even when the number of modules is different, or when a power supply unit configured by connecting a plurality of cells is provided. By applying, the same effect as this application can be obtained.
• the power supply unit of an electric vehicle having a plurality of modules can be managed accurately and easily, and can be applied to a power supply management device.

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• 2007
  • 2007-09-28 JP JP2007256427A patent/JP5266702B2/ja active Active
• 2008
  • 2008-03-14 US US12/445,395 patent/US8232886B2/en active Active
  • 2008-03-14 CN CN2008800010133A patent/CN101548192B/zh active Active
  • 2008-03-14 EP EP08738689.2A patent/EP2081038B1/en active Active
  • 2008-03-14 WO PCT/JP2008/055186 patent/WO2009041091A1/ja active Application Filing

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